[Developer] Add build.sh to developer/js

This change is has not been approved by the UK parliament :p

[ios] Capitalize the heading for Keyboards and Language settings

[Android] If the keyboard view is not ready, calling javascript functions will crash

[LMLayer] Documents the methods of WorkerInternalModel

Co-Authored-By: Eddie Antonio Santos <easantos@ualberta.ca>

[Android] Force KitKat as minimum supported version

[iOS] Fixes the in-app banner issue.

[LMLayer] Disable Firefox and Edge in unit tests

[ios] ui language add lexical model

Merge branch 'ios-ui-language-add-lm' of https://github.com/keymanapp/keyman into ios-ui-language-add-lm
git push said it was necessary

[Android] Comments out hooks for rotation suggestion.

[LMLayer] Make license consistent with rest of Keyman